Electric-light switch fot telephone-booths.



s. M 0. GRANT. ELEUTRIG LIGHT SWITCH FOR TELEPHONE BOOI'HS.

APPLIGATLON FILED MAIS, 1910.

Patented Mar. 21, 1911.

INVENTQR 5 6 1 WITNESSES UNITED STATE S PLENT- OFFICE.

SAMUEL M. 0. GRANT, OF PITTSBUBG, PENNSYLVANIA.

tion aims to arrange a candescent lamp in a telephone booth or upon thetelephone, whereby when the booth or telephone are being used alight canbe maintained that will facilitate the user of the booth or telephone inexamining the telephone directory and transcribing any messages receivedover the telephone.

i The primary object'of my invention is to i provide a device of'tlieabove type that can be either operated when the telephone directory isbeing used or when the telephone being used, the device including twocircuits that can be independently used oclamp and a ca-sion mayrequire.

To attain the above object, I have devised a novel switch which iscompact, simple in construction, and inexpensive tomanu'fiacture, theswitch'being located upon the telephone to be automatically actuated thetelephone directory or the telephone receiver are brou ht into use..Inconnection with the switch there is an incandescent suitable sourceof electrical energy, the lamp being of sufficient candle power toinsure a light in proximity to the telephone, whether the same locatedin a booth, dark alcove, or room.

My invention, will be better understood after being specificallydescribed, and rotoronce will now be had to-the drawing forming part ofthis specification, wherein there is illustrated-a preferred embodnnentof the invention, but it is to be understood that-the structuralelements thereof can be varied or changed, as to the size, shapeandmanner of assemblage without departing from the scope of the inventiom MV In the drawings: Figure 1 1s a front elevation of a telephone providedwith the li hting device. Fig. :2 is a side elevation. o the same. Fig.3 is an enlarged vertical sectional view of the switch showing theSpecification of Letters Patent.

M. O. Guiana;

when

ELECTRIC-LIGHT SW'ITGH FOR TELEPHONE-ROUTES.

same in an Open position. Fig. 4 is a similar view showing the directoryswitch rod 111 a closed positlon and the receiver switch rod in an openposition, and Fig. 5 is a similar vlew showing the directory switch rodin an open position and the receiver switch rod in a closed position. x

In the accompanying drawings the ret erence numeral 1 denotes thebaclcboard of a wall telephone, the lower end of the board beingenlarged to support a battery box 2 containing battery cells oranoth'ersource ul' electrical energy.

at denotes a call 1m" mounted upon the-up per part of the board 1, thisbox having Patented Mar.21, 1911. 7 Application filed May 5, 1910.Serial No. 559,437.

interalia-collapsible bells 5 and a spring actuated receiver arm 6adapted to support 'a receiver 7, which is connected by a wire 8 to thebinding post 9,015 the call box 4.

lO-denotes a switch block made of an insulating material, as fiber andthis block is suitably'secured to the sidevof the box t ed jacent to theupper end thereof and directly above the receiver arm 6, preferably byscrews 11. Inthe upper end ot the block 10 are arranged contact piecesl2 having thelower edges thereof provided with. sock ets 18. Incommunication with these sockets are vertical openings 14 and 1.5 andextending into said openings are a directory switch rod 16 anda receiverswitch rod 1'3, said rods having the upperends thereof tapered topositively engage in the sockets 13. Err tending throughthe'metalliccontact pieces 12 is a metallic tube 18, the ends of saidtube terminating at the vertical edges of the block 10, whereby ametallic plug 19 can be in serted in'either end of said tube.

-20 denotes an incandescent lamp mounted upon the front sideof the box 4and-this lamp is connected by awire 21 to the plug 19 and by a wire22'to one of the cells 3 within the battery box 2. ,The cells areconnected inseries and one of said cells is con nectcd by a wirehavingbranches 2% and 25 suitably connected to the rods 16 and 17respectively.

' 26 denotes abifurcated head carried by the lower end' of the rod 17and embracing the receiver'arm 6.

27 denotes a head carried by the lower end of therod l6 and adapted torest upon a bracket 28 secured to the side of the battery box 4..Attached to the upper end oi, the-head SZTis aresilient arm or curvedspring 29 having the opposite end, thereof connected to the side of thebattery box 2, as

' is released and the switch rod 16 is immediately elevated, com letingan electrical circuit which is as-fo lows: from the battery by the wire22 to the lamp20, by the wire 21 to the plug 19, by the tube 18 and thecontact piece 12 to the rod 16, by the branch 24 of the wire 23 to thebattery, thus completing a circuit through the lamp which furnishessuflicient light in the vicinity of the telephone.

Should the receiver 7 be removed from the arm 6, the arm immediatelyraises the rod 17 in the switch block 10 and an electrical circuit iscompleted, which is as follows: from the battery 2 by the Wire 22 to thelamp 20, by the wire 21 to the plug 19, by the tube 18 and contact piece12 to the rod 17, by the branch 25 of the wire 23 to the battery, thuscompleting another circuit through the lamp 20.

From the foregoing it will be observed lhat I ha vc devised a novelswitch for controlling the operation of an electric lamp and it i s inconnection with this lamp that i through 'said contact pieces, a contactplug seated in said 'nietallic tube and connected with a source ofelectrical energy thereby connecting said contact pieces to said source,and a pair of spring controlled rods slidably mounted in said supportand connected with the source of electrical energyand adapted -to engage1n the sockets of said contact pieces thereby completing the circuit.

In testimony whereof I afiix my signature in the presence of twowitnesses.

SAMUEL 0. GRANT. iVitnesses KARL H. BUTLER, MAX H. Snonovrrz,

